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2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting最新文献

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A novel block elimination procedure for general linear systems of equations 一般线性方程组的一种新的块消去法
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805057
I. Ciric
{"title":"A novel block elimination procedure for general linear systems of equations","authors":"I. Ciric","doi":"10.1109/ANTEMURSI.2009.4805057","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805057","url":null,"abstract":"Groups of unknowns in linear systems of algebraic equations are eliminated by solving smaller systems whose coefficients are just coefficients in the original systems, with no matrix inversions and multiplications being involved. This could yield solutions with improved accuracy with respect to other solution methods. The amount of computation involved is only slightly higher than that in the Gaussian elimination.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115394132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Size reduction and harmonic suppression of parallel coupled-line bandpass filters using defected ground structure
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805078
F. Karshenas, A. Mallahzadeh, J. Rashed‐Mohassel
{"title":"Size reduction and harmonic suppression of parallel coupled-line bandpass filters using defected ground structure","authors":"F. Karshenas, A. Mallahzadeh, J. Rashed‐Mohassel","doi":"10.1109/ANTEMURSI.2009.4805078","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805078","url":null,"abstract":"A novel miniaturized parallel coupled-line bandpass filter with suppression of second, third and fourth harmonic frequencies, is demonstrated in this paper. The new filter is based on the slow-wave effect of the defected ground structure (DGS) to achieve size minimization, while the spurious responses are eliminated by the band-rejection property. These features offer the classical parallel coupled-line bandpass filter simultaneous compactness and wide stopband performance. Using DGS does not require the filter parameters to be recalculated and, this way, the classical design methodology for coupled-line microstrip filters can still be used. The simulations and measurements of a 2.0 GHz prototype bandpass filter are presented. The measured results agree well with the simulation data. Compared with the conventional parallel coupled-line bandpass filters, the second, third and fourth measured spurious responses are suppressed to -45, -43 and -34 dB, respectively. In addition, the size of the prototype filter circuitry can be reduced up to 20%.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122503596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 36
Applying combined field integral equation technique to analyze quasi-waveguide structures 应用联合场积分方程技术分析准波导结构
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805069
L. Golestanirad, M. Mattes, J. Mosig
{"title":"Applying combined field integral equation technique to analyze quasi-waveguide structures","authors":"L. Golestanirad, M. Mattes, J. Mosig","doi":"10.1109/ANTEMURSI.2009.4805069","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805069","url":null,"abstract":"In this paper a detailed mathematical procedure is described to evaluate modal scattering parameters conventionally defined in planar multilayered structures excited by wave ports. Combined Field Integral Equation technique is implemented and solved using method of moments. The developed formulation then is successfully applied to analyze waveguide structures and proved to be very efficient in the term of accuracy and performance.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129796703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Effective-medium properties of a free-space transmission-line metamaterial superlens 自由空间传输在线超材料超透镜的有效介质特性
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805073
A. Iyer, G. Eleftheriades
{"title":"Effective-medium properties of a free-space transmission-line metamaterial superlens","authors":"A. Iyer, G. Eleftheriades","doi":"10.1109/ANTEMURSI.2009.4805073","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805073","url":null,"abstract":"This work discusses the validity of the effective-medium interpretation of the multilayer negative-refractive-index transmission-line (NRI-TL) metamaterial superlens using supporting simulation and experimental data. The uniqueness of its extracted effective permittivity and permeability is verified through a comparison of simulation data for lenses of different thicknesses, and simulations of negative refraction for various angles of incidence illustrate that an effective-medium perspective is justified. Experimental results for subdiffraction imaging are corroborated by the theory governing the relationship between loss, resolution, and bandwidth.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124330343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Array lens antenna using element rotation 阵列透镜天线采用元件旋转
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805099
R. H. Phillion, M. Okoniewski
{"title":"Array lens antenna using element rotation","authors":"R. H. Phillion, M. Okoniewski","doi":"10.1109/ANTEMURSI.2009.4805099","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805099","url":null,"abstract":"The concept of an array lens antenna which uses element rotation to provide phase shift is presented. A stacked patch and cross-shaped aperture element is designed to operate at 11.6 GHz. This element provides phase shift upon transmission for circular polarization. Successful operation over a 3% bandwidth was achieved in simulation.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121973987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Numerical prediction of neural activation in electrically stimulated retina 电刺激视网膜神经活动的数值预测
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805052
C. Cela, G. Lazzi
{"title":"Numerical prediction of neural activation in electrically stimulated retina","authors":"C. Cela, G. Lazzi","doi":"10.1109/ANTEMURSI.2009.4805052","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805052","url":null,"abstract":"Degenerative retinal diseases such as Retinitis Pigmentosa (RP) and Age Related Macular Degeneration (AMD) result in progressive loss of photoreceptor cells in the retina without completely disrupting the rest of the visual neural path. Implantable retinal prostheses have been shown to be capable of restoring some form of vision to patients affected by these conditions by providing systematic electrical stimulation to the retinal ganglion cells, thus partially replacing the functionality of the diseased photoreceptors cells. In this paper, we determine the areas where retinal ganglion cells are depolarized and hyperpolarized by the artificial electrical stimulation. This is achieved by calculating the activation function from the potential scalar field obtained using the admittance method with three-dimensional models of the retina, implanted electrode, and surrounding tissue.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132145351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Axial Scattering by an Isorefractive Parabolic Cylinder 等折射率抛物柱面的轴向散射
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805123
P. Uslenghi
{"title":"Axial Scattering by an Isorefractive Parabolic Cylinder","authors":"P. Uslenghi","doi":"10.1109/ANTEMURSI.2009.4805123","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805123","url":null,"abstract":"The exact solution to the boundary-value problem of a plane wave axially incident on a parabolic cylinder separating two different media isorefractive to each other is obtained in closed form, in the frequency domain.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114790901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Dielectric volume measurements for biomedical applications 生物医学应用的介电体积测量
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805089
P. Meaney, Amir H. Golnabi, M. Fanning, S. Geimer, K. Paulsen
{"title":"Dielectric volume measurements for biomedical applications","authors":"P. Meaney, Amir H. Golnabi, M. Fanning, S. Geimer, K. Paulsen","doi":"10.1109/ANTEMURSI.2009.4805089","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805089","url":null,"abstract":"We have developed a dielectric measurement system for recovering the properties of bulk tissue samples utilizing a specialized configuration of our microwave tomographic imaging system. We exploit the fact that the sample's location, shape and size can be determined a priori based on the known fixture geometry and integrate this with a soft prior algorithm to essentially recover a single dielectric property within the target zone. This is potentially an important approach for cases where the widely applied coaxial probe approach is not optimal due to poor surface contact and property differences between the surface and tissue interior. For example, the treated surface of a sample of cancellous bone can be quite heterogeneous given the intricate web of trabeculae, fat and marrow. Our technique is able to reconstruct a value for this sample which is indicative of the whole volume.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"163 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114919206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
A parametric study using ansoft HFSS and ansoft designer on the effect of aperture diameter on the transmission properties of its array 利用ansoft HFSS和ansoft设计软件进行了孔径对其阵列传输特性影响的参数化研究
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805108
F. Safari, L. Shafai
{"title":"A parametric study using ansoft HFSS and ansoft designer on the effect of aperture diameter on the transmission properties of its array","authors":"F. Safari, L. Shafai","doi":"10.1109/ANTEMURSI.2009.4805108","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805108","url":null,"abstract":"A rigorous parametric study on the effect of aperture diameter on transmission properties of an array of apertures is performed. Unit cells include centered apertures. Centered circular aperture diameter swept for a wide range and different simulations using Ansoft HFSS and Ansoft Designer is accomplished. Ansoft Designer is shown to be unable in properly treating the unit cells which have some metallic parts touching unit cell's boundary. Using a new feature in Ansoft HFSS 11.0, TE - Mode and TM - Mode transmission properties of an array of centered apertures is investigated. With the unit cell having the same transverse dimensions as X-band waveguide, and sweeping aperture diameter a single resonance for TE - Mode and double resonances for TM - Mode is discovered, in the single-mode frequency range of X-band waveguide.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125078275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
A sual-arm Archimedean spiral antenna over a low-profile artificial magnetic conductor ground plane 一种在低轮廓人工磁性导体接地面上的双臂阿基米德螺旋天线
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805090
A. Mehrabani, L. Shafai
{"title":"A sual-arm Archimedean spiral antenna over a low-profile artificial magnetic conductor ground plane","authors":"A. Mehrabani, L. Shafai","doi":"10.1109/ANTEMURSI.2009.4805090","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805090","url":null,"abstract":"this paper presents a low-profile dual-arm Archimedean spiral antenna over an artificial magnetic conductor (AMC) ground plane. The antenna under study produces right handed circular polarization. The AMC ground plane consist of 4×4 square patches with no vias. The distance between the antenna and the top of the AMC ground plane is reduced to 0.02λ<inf>0</inf>. The operating frequency is 4.5GHz. The planar size of the ground plane is 0.837λ<inf>0</inf> × 0.837λ<inf>0</inf>.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"1993 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128631383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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